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4 R E V E L G N E S A H A L NUT FORGING MACHINE.

No. 310,680. Patented Jan. 13, 1885.

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F. A. HASENOLEVER.

NUT romme MACHINE.

No. 310,680. I Patented Jan. 13, 1885.

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(No Model.) 4 Sheets-Sheet PQA ASENOLEVER. NUT FORGING MAGHINE. No. 310,680 Patented Jan. 13, I885.

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FRIEDRICH ALBERT HASENOLEVER, OF DUSSELDORF, GERMANY, ASSIGNOR TO THE PATENT NUT AND BOLT COMPANY, (LIMITED,) OF LONDON WVORKS, EN GLAND.

NUT FORGlNG MACHENE.

LPECIEICA'IEON forming part of Letters Patent No. 310,680, dated January 13, 1885.

Application filed September 1, 1884. (N model.) Patented in Germany October 21, 1831, No. 18, 103; in England July 3, 1884, No.

9,725; in Belgium August 1, 1884, No. 65,023, and in Canada September 24, 1884, No. 20,258.

To all whom it nuty concern:

Be it known that I, FRIEDRICH ALBERT HAsENcLEvER, a citizen of the United States, residing at Dusseldorf, in the German Empire, have invented an Improvement in Nut- Forging Machinery, of which the following is a specification.

My invention relates to machinery for forging blanks for screw-nutsthat is to say, cut- .10 ting off a piece of metal from the endof a hot bar, forcing this piece into a die, where it is compressed and molded to shape, and has a central hole punched through it, and extruding it from the die in a form ready to have a screw-thread cut in it, and to be completed as a nut.

The machinery about to be described is applicable for forging nuts of square, hexagonal, or other polygonal forms, or it might be used for round, square, or polygonal washers orsuch like articles having holes through them also by suppressing the punches which pierce the central hole articles having no holes through them could be forged, the dies being shaped 2 5 to suit these articles-such as keys, dogs, clips, cotters, wedges, gibs, and the like. -As nuts, particularly those of hexagonal form, are very largely used, and as the machinery about to be described gives special facilities for forg- 0 ing these, I will describe the machinery as adapted for forging hexagonal nuts, referring to the accompanying drawings.

Figure 1 is a side elevation. Fig. 2 is a longitudinal section. Fig. 3 is a plan. Fig.

5 at is a transverse section on X X, and Figs. 5 and 6 are transverse sections, respectively, on Y Y and Z Z; and Fig. 7 is a section of the main shaft, showing two of the cams thereon.

A shaft, a", driven from any suitable motor,

has on it a pinion, a, which gears with the toothed wheel This wheel is not keyed on the main shaft 1) of the machine, but drives it by means of two pins, b b, which enter the boss of the wheel Zr, and also enter a collar, I),

5 fixed on the shaft 1). In case of the machine being subjected to excessive strain, the pins If I) will give way, saving more important parts of the machine from fracture. The main shaft Z1 has fixed on it three sets of camsnamely, a pair, I) I), which are alike and which act together to move toward the left a slide, 0, a central cam, b which moves toward the left a second slide, a, fitted centrally in the slide 0, and a cam, b having two protuberances, b b, which twice in every revolution of the shaft move to the left a sliding bar, f. A bellcrank lever, X, pivoted on the framing, has one of its arms, on, entering notches in the slides o c, and its other arm, 00, projecting, so

that the cam If, after it has passed the nose of the slide 0, acts on this arm, causing both the slides e and c to be drawn back to the right. The sliding bar f is drawn back by springs f f, and is connected to one arm of a lever, h, the other arm of which enters a notch in a 6 sliding bolt, 9. This bolt is fitted to slide within ahead, g, which is itself free to slide a little backward on the framing, but is pressed forward toward the right by a screw, 10, butting against it, preferably with a piece, 19, 7o interposed, which will break in case of excessive strain. This screw passes through a nut in a cross-head, 1', which is connected by two tiebolts, s s, to the ends of a spring,

a, bearing in its middle against a bar, w, that extends across the framing and lodges against the two bearings of the main shaft. The slide 0 terminates in a head, 0, in which is fitted the die-box having fixed in front of it two adjustable stop-gages, e e. The slide 0 carries the long round punch Z, which passes through a central hole in the compressingpunch m. This punch enters the back of the diebox and is carried on a slide, 0 which is fitted in the slide 0 to the left of the slide 0.

On the head 9 is fixed the cutting-punch m through the center of which passes the short round punch Z this punch being attached to the sliding bolt and being drawn to the left by a lever and a spring, Z".

The heated bar a to be operated on is supported on a rest, 1 in such a position that its end bears against the gage 0, while its upper side bears against the gage e". The face of the bar thus placed extends across the die- 5 box, the width of that face being such that it exactly covers the two vertical sides of the hexagon, leaving atriangular space of the hexagon open above and below it. By the action of the cams b the slide 0, carrying the dieboX, is pushed to the left, and is immediately followed by the slide 0, which carries the round punch Z, this slide being advanced by the action of the cam b Both these cams b b are preferably made, as shown in Fig. 7, to give the advance of their respective .slides by two steps. By the advance of the die-box, pushing the bar 2 against the cutting-punch m a rectangular piece is cut from the end of the bar and lodged in the die-box, and this piece is penetrated by the advance of the punches Z and Z this penetration, by displacing metal from the center of thepiece,having the effect of swelling it out so as nearly to fill the diebox 5 also, when the slide 0 has advanced a certain distance, shoulders c on this slide come to bear against the slide 0', and this, by the farther advance of c, is itself advanced, so that the compressing-punch m accompanies the die-box in the latter part of its movement to the left, and the piece of metal in the die-box is thus compressed between the cutting-punch m and the compressing-punch m, while at the same time it is penetrated by the two round punches Z and Z and is thus moldedto the hexagonal shape of the die-box. The short round punch Z however, presently retreats, while the long round punch l continues to advance, pushing a small core or wad of metal into the hole of the cutting-punch m of metal is completely shaped to the form of the die-box, punched through the middle, and consolidated by compression within the dieboX. The Whole strain of the compression is conveyed through the bolt p, the cross-head 1", and the tie-bolts s s to the spring u, and thence to the bar 20 and the bearings of the shaft b, so

that there is no breaking-strain imposed on the base-framing, and the construct-ion and arrangement of parts provide .for taking up the strain against the cutting-punch m during the compression of the nut, whereas if the strain against the cutting-punch were taken by fixing its slide upon the bed of the machine, so that it had no support from the bolt 19 behind it, then the framing of the machine would be broken by the compression of the first nut. This I avoid by taking the strain through the bolt 19, cross-head r, tie-bolts s, and spring a to the bar 10. Obviously by screwing up the bolt p the spring a is more strained when the compression-strain comes. By screwing more or less forward the screw p the punch mis more or less advanced toward the die-box, and thereby the degree of compression increased or decreased, as desired. After the piece of metal has been thus punched, compressed,

Thus the piece and molded to shape, the die boX retreats,and with it for a certain distance also retreats the compressing-punch m,- but presently the slide 0 which carries this punch, comes against a 6 stop, k, bolted to the framing, and thus the compressing-punch m is prevented from retreating farther; but as the die-box and the round punch 1 continue to retreat, the nutblank thathas been forged is extruded from the die-box and drops down into the space in the base of the machine. The short round punch Z is by the action of the second cam protuberance, b caused to make a second ad- Vance to the right, extruding from the hole of 7 the cutting-punch m the small core or wad of metal, and this being done the punch Z retreats, and all the parts are in condition for a fresh operation.

For the cams b b and the bell-crank lever X might be substituted eccentrics linked, respectively, to the slides a 0; but cams are pre ferred, as they facilitate suitable timing of the several movements.

Having thus described the nature of my invention and the best means I know for carrying the same into practical effect, I claim 1. The combination, in a nut-forging machine, of a main shaft, b, having the duplicate cams b, the central cam, b and the cam if, having double protuberances b the slides c c c, the spring sliding bar f, the lever h, the sliding bolt 9 the sliding head 9, the screw p, the cross-head r, the tie-bolts s, the spring to, the bar to, the frame supporting said bar, the die-box in the slide 0, the compressing-punch m, and the round punches Z P, substantially asdescribed.

. 2. The combination of the main frame b, having the duplicate cams b b, the central IOO cam, b and the cam b, having the double protuberances b the slides a c c", the bell-crank lever X, the spring sliding barf, the lever h,

the sliding bolt 9, the sliding head asupport, 19, for the head, the die-box in the slide 0, I05

the compressing-punch m, and round punches Zl", substantially as described. 1

3. The combination of the duplicate cams b I), the central cam, b and the cam 11 having double protuberances b 12 with the slides c c I 10 c", the bell-crank'lever X, the spring sliding barf, the lever h, sliding bolt 9, the die-box, the compressing-punch m, and round punches l and Z", substantially as described.

In testimony whereof Ihavesigned my name I I 5 to this specification, in the presence of two sub scribingwitnesses, this 11th day of August, A.

FRIEDRICH ALBERT HASENCLEVER.

Witnesses:

ERENs'r SoHAARWiioHTER, THEO. I. ESTEY. 

